Rheum rhabarbarum

RHS Plant Profile
wavy-leaved rhubarb

Synonyms

Rheum undulatum

Herbaceous Perennial

A large herbaceous perennial which overwinters as a short crown, and in spring produces triangular to heart-shaped dark green leaves with strongly wavy edges, held on thick, angular, hollow reddish stems. In mid summer, dense panicles of small yellow-white or greenish-white flowers are held on upright stems above the foliage, followed by flat, tan-coloured seeds. This species may have been involved in the parentage of the hybrids now used as culinary rhubarb

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity
2–5 years
Max Spread
1-1.5 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Polygonaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling Pets: Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
Rheum are robust rhizomatous herbaceous perennials with large, simple or palmately lobed leaves and tall leafy stems bearing large panicles of tiny flowers
Name Status
Correct
Plant Range
China Mongolia Russia

How to Grow

Cultivation

Grow in moist but well drained soil. Mulch with manure in spring; avoid covering the crown. Keep watered in dry summers. See rhubarb cultivation for more detailed advice

Propagation

Propagate by seed or by division

Suggested planting locations and garden types

  • Architectural
  • Cottage and informal garden

Pruning

Deadhead spent flower spikes unless seed is required, cut back faded leaves at the end of the season

Pests

May be susceptible to slugs and aphids

Diseases

May be susceptible to crown rot, honey fungus and virus diseases